Hi, sorry for my english is not my native language,
why in mp4 profiles i cant set (remux) multiple subtitle files when converting from mkv to mp4. I only can set one subtitle track and must be rendered in video track. Other software like dvdfab allow multiple tracks on mp4 files.
Creating custom mp4 profile in CxV and manually set this options with external text editor on profile, CxV allows select multiple subtitle tracks and mp4 file is fully functional, tested with VLC and MediaPlayer Classic